This report reviews data that the Administration has provided to Congress on the costs of U.S. forces based abroad and on the value of host nation support contributions. It analyzes the data in order to assess potential defense budget savings from measures now under congressional consideration. The report concludes that, because of shortcomings in the data, estimates of savings in the U.S. defense budget from increased host nation contributions are often overstated. Some commonly accepted assertions frequently cited in the congressional burdensharing debate, therefore, are of doubtful validity.

The United States military has been building up forces on the U.S. territory of Guam to increase deterrence and power projection for possible responses to crises and disasters, counter-terrorism, and contingencies in support of South Korea, Japan, the Philippines, Taiwan, or elsewhere in Asia. But the defense buildup on Guam is moderate. China has concerns about the defense buildup. Guam's role has increased with plans to withdraw some U.S. forces from Japan and South Korea. This report describes in brief detail the various cooperative efforts, including financial efforts, undertaken by the U.S. and the above nations.